Wen Peng, Zehang Lu, Enyang Liu, Wenteng Wu, Sirong Yu, Jie Sun
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引用次数: 0
摘要
作为可生物降解材料,锌(Zn)和锌基合金因其在生物医学应用中的巨大潜力而受到广泛关注。然而,纯锌和二元锌合金的强度较低,限制了它们的广泛应用。本研究采用搅拌铸造法制备了 Zn-1Fe-xSr(x = 0.5、1、1.5、2 wt.%)三元合金,并对其相组成、显微结构、拉伸性能、硬度和降解行为进行了研究。结果表明,加入 Sr 元素后,Zn 基体中生成了 SrZn13 相,Zn-1Fe-xSr 合金的晶粒尺寸随 Sr 含量的增加而减小。极限拉伸强度(UTS)和布氏硬度随 Sr 含量的增加而增加。Zn-1Fe-2Sr 合金的 UTS 和硬度分别为 141.65 MPa 和 87.69 HBW,比 Zn-1Fe 合金分别高 55.7% 和 58.4%。随着 Sr 含量的增加,Zn-1Fe-xSr 合金的腐蚀电流密度增大,电荷转移电阻明显下降。Zn-1Fe-2Sr 合金的降解率为 0.157 mg-cm-2-d-1,比 Zn-1Fe 合金的降解率高 118.1%。此外,随着浸泡时间的延长,Zn-1Fe-xSr 合金的降解率显著下降。
Preparation, Mechanical Properties, and Degradation Behavior of Zn-1Fe-xSr Alloys for Biomedical Applications.
As biodegradable materials, zinc (Zn) and zinc-based alloys have attracted wide attention owing to their great potential in biomedical applications. However, the poor strength of pure Zn and binary Zn alloys limits their wide application. In this work, a stir casting method was used to prepare the Zn-1Fe-xSr (x = 0.5, 1, 1.5, 2 wt.%) ternary alloys, and the phase composition, microstructure, tensile properties, hardness, and degradation behavior were studied. The results indicated that the SrZn13 phase was generated in the Zn matrix when the Sr element was added, and the grain size of Zn-1Fe-xSr alloy decreased with the increase in Sr content. The ultimate tensile strength (UTS) and Brinell hardness increased with the increase in Sr content. The UTS and hardness of Zn-1Fe-2Sr alloy were 141.65 MPa and 87.69 HBW, which were 55.7% and 58.4% higher than those of Zn-1Fe alloy, respectively. As the Sr content increased, the corrosion current density of Zn-1Fe-xSr alloy increased, and the charge transfer resistance decreased significantly. Zn-1Fe-2Sr alloy had a degradation rate of 0.157 mg·cm-2·d-1, which was 118.1% higher than the degradation rate of Zn-1Fe alloy. Moreover, the degradation rate of Zn-1Fe-xSr alloy decreased significantly with the increase in immersion time.
期刊介绍:
Journal of Functional Biomaterials (JFB, ISSN 2079-4983) is an international and interdisciplinary scientific journal that publishes regular research papers (articles), reviews and short communications about applications of materials for biomedical use. JFB covers subjects from chemistry, pharmacy, biology, physics over to engineering. The journal focuses on the preparation, performance and use of functional biomaterials in biomedical devices and their behaviour in physiological environments. Our aim is to encourage scientists to publish their results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Several topical special issues will be published. Scope: adhesion, adsorption, biocompatibility, biohybrid materials, bio-inert materials, biomaterials, biomedical devices, biomimetic materials, bone repair, cardiovascular devices, ceramics, composite materials, dental implants, dental materials, drug delivery systems, functional biopolymers, glasses, hyper branched polymers, molecularly imprinted polymers (MIPs), nanomedicine, nanoparticles, nanotechnology, natural materials, self-assembly smart materials, stimuli responsive materials, surface modification, tissue devices, tissue engineering, tissue-derived materials, urological devices.